FYI (also, if you're not on at least one of these lists, you probably
should be).

---------- Forwarded message ----------
From: Gregory Szorc <gsz...@mozilla.com>
Date: Thu, Mar 31, 2016 at 5:39 PM
Subject: Upcoming SSH Host Key Rotation for hg.mozilla.org
To: dev-version-cont...@lists.mozilla.org, dev-platform <
dev-platf...@lists.mozilla.org>, Firefox Dev <firefox-...@mozilla.org>,
release-engineer...@lists.mozilla.org


This message serves as a notice that the *SSH host keys* for
hg.mozilla.org will be rotated in the next ~24 hours.

When connecting to hg.mozilla.org over SSH, your SSH client should warn
that host keys have changed and refuse to connect until
accepting/trusting the new host key. After 1st host key verification
failure:

1) `ssh-keygen -R hg.mozilla.org` to remove the old host key
2) `ssh hg.mozilla.org` and verify the fingerprint of the new key
matches one of the following:

256 SHA256:7MBAdqLe8+aSYkv+5/2LUUxd+WdgYcVSV+ZQVEKA7jA hg.mozilla.org
(ED25519)
256 SHA1:Ft++OU96cvaREKNFCJ6AiuCpGac hg.mozilla.org (ED25519)
256 MD5:96:eb:3b:78:f5:ca:19:e2:0c:a0:95:ea:04:28:7d:26 hg.mozilla.org
(ED25519)

4096 SHA256:RX2OK8A1KNWdxyu6ibIPeEGLBzc5vyQW/wd7RKjBehc hg.mozilla.org (RSA)
4096 SHA1:p2MGe4wSw8ZnQ5J9ShBk/6VA+Co hg.mozilla.org (RSA)
4096 MD5:1c:f9:cf:76:de:b8:46:d6:5a:a3:00:8d:3b:0c:53:77 hg.mozilla.org
(RSA)

Q: What host key types were changed? We dropped the DSA host key and
added a ED25519 host key. The length of the RSA key has been increased
from 2048 to 4096 bits.

Q: Does this impact connections to https://hg.mozilla.org/? No. The x509
certificate to the https:// endpoint is remaining unchanged at this time.

Q: Why is this being done? We are modernizing the server infrastructure
of hg.mozilla.org. As part of this, we're bringing the hosts in
compliance with Mozilla's SSH security guidelines
(https://wiki.mozilla.org/Security/Guidelines/OpenSSH).


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